We've released a mandatory update for Team Fortress 2. The new version number is 4280740. The notes for the update are below.---------------------------------

- Fixed a client crash related to viewing notifications- Fixed being able to interrupt taunts using the ConTracker commands- Fixed a bug with the Medi Gun not staying attached to players- Fixed a bug with the Backburner using its owner's angle to determine whether the attack is behind the victim- Fixed a rendering issue with the Spectral Swirl unusual effect- Fixed not being able to fire the Dragon's Fury in some areas (e.g. the control point on Nucleus)- Fixed not being able to light Huntsman arrows with the Dragon's Fury- Fixed Dragon's Fury projectiles not fizzling when hitting water- Fixed not being able to detonate stickybombs when switching to melee with secondary attack held down- Fixed the charge sound for the Stickybomb Launcher not stopping if the player switches weapons while charging- Fixed Quick-Fix Medics not properly following/mirroring the Pyro after launching with the Thermal Thruster- Fixed being able to shoot flares through objects like setup gates - Fixed the Pretty Boy's Pocket Pistol always giving 7hp per-hit- Fixed the Winger not counting towards the Scout achievement "Gun Down"- Fixed the Festive Sandvich not counting towards the Heavy achievement "Konspicuous Konsumption"- Fixed the Rescue Ranger not counting towards the Engineer achievement "Texas Two-Step"- Fixed the Genuine version of the Flying Guillotine having no taunt- Updated the Vita-Saw so victims spawn random internal organs on hit- Updated the Atomizer damage penalty vs players to -15% (from -25%)- Updated the party system so invites are shown to all party members- Updated the Thermal Thruster stomp damage on other players to be 3x the base fall damage - not the reduced fall damage of the owner- Updated the "With Friends Like these..." achievement to check for five friends instead of seven- Added the Heals for Reals 2017 community medals- Added the "Philanthropist's Indulgence" community medal for Random Acts of TF2- Added the "Spectral Snowflake" community medal for the Nightmare Before Smissmas 2017 community showcase